Analytical Method: Ammonium in sewage sludge

Instrument and Reagents:

Cat.No. 173016  Spectroquant® VIS Spectrophotometer Prove 100 or

Cat.No. 173017  Spectroquant® UV/VIS Spectrophotometer Prove 300 or

Cat.No. 173018  Spectroquant® UV/VIS Spectrophotometer Prove 600 or

Cat.No. 109748  Spectroquant® Photometer NOVA 30 or

Cat.No. 109751  Spectroquant® Photometer NOVA 60 or

Cat.No. 173632  Spectroquant® Colorimeter Move 100

Cat.No. 114946  Rectangular cells 10 mm and/or

Cat.No. 114947  Rectangular cells 20 mm and/or
Cat.No. 114944  Rectangular cells 50 mm and/or
Cat.No. 114558  Spectroquant® Ammonium Cell Test
Cat.No. 114544  Spectroquant® Ammonium Cell Test*
Cat.No. 114559  Spectroquant® Ammonium Cell Test
Cat.No. 114752  Spectroquant® Ammonium Test
Cat.No. 100683  Spectroquant® Ammonium Test
Cat.No. 116754  Water for analysis
Charcoal activated for soil tests
Folded filter
*not compatible with Move 100
Sample preparation:
In a 1000-ml volumetric flask mix 50 g of the sample with water for analysis and fill up to volume. Let the insoluble parts settle and decant 250 ml of the supernatant solution. Then mix with 2.5 g of charcoal activated for soil tests and stir for 10 minutes, before filtering through a folded filter.
Determine with the above mentioned test kits.
Ammonium content in mg/l NH4 = analysis value in mg/l NH4 x 20


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